Kan. Stat. § 19-2841
The board of county commissioners of any county having a population of more than eight thousand and less than nine thousand and having an assessed valuation of tangible property of more than sixteen million dollars, may join with the board of county commissioners of an adjoining county having a population of more than eleven thousand and less than twelve thousand and having an assessed valuation of tangible property of more than twenty-three million dollars, and the board of county commissioners of any county having a population of more than forty thousand and less than fifty thousand and having an assessed valuation of tangible property of more than one hundred million dollars, may join with the board of county commissioners of an adjoining county having a population of more than twenty-four thousand and less than thirty thousand and having an assessed valuation of tangible property of more than ninety million dollars, in establishing joint park and recreational grounds, may purchase or acquire title to necessary lands and property by donation, devise, bequest or condemnation proceedings for the purpose of establishing such joint park and recreational grounds in such counties.
K.S.A. 19-2841